NURS 641 MIDTERM REVIEW QUESTIONS WITH
100% CORRECT ANSWERS
The strength of association between two variables is indicated by which statistical method?
a. Correlation coefficient
b. Cronbach's alpha
c. Dichotomous measurement
d. Histogram
A correlation coefficient
What does a p-value of 0.08 mean?
a. There are 8 chances in 100 that the finding is true
b. There are 8 chances in 100 that the finding is a chance variation
c. There are 8 chances in 10 that the finding is true
d. There are 8 chances in 100 that the finding is biased
B.
When one variable precedes the other in time and the correlation between them is high,
which statement can be made with confidence?
a. The variable that comes earliest in time causes the other variable
b. There is a high level of association between the two variables
c. The two variables have an association with an outcome variable
d. There are no extraneous variables at work in the situation
B
What does the statistic r2 represent?
a. What would happen if the variable were present at twice the levels found
b. The chances that the variables are perfectly correlated
, c. The proportion of variation in one variable that is accounted for by variation in the other
variable, and vice versa
d. What the correlation coefficient would be if the sample size were twice as large
C
What are the two dimensions that describe a relationship between two variables?
a. Truth and consequences
b. Direction and strength
c. Strength and weakness
d. Increasing and decreasing variation
B
In a correlation study, the p value of a Pearson r statistic is 0.005. What does this mean?
a. There is a small association between the two variables
b. There is a very small chance that the relationship between the two variables is zero
c. The variable that is first in time determined .5% of the variation in the other variable
d. Only 5% of the variables are the result of shared influences
B
What does a negative correlation statistic value mean?
a. For most individuals, both variables had values less than zero
b. The results are the opposite of what was expected
c. On the whole, individual with low values on one variable tended to have low values on
the other variable
d. On the whole, individuals with high values on one variable tended to have low values on
the other variable
D
100% CORRECT ANSWERS
The strength of association between two variables is indicated by which statistical method?
a. Correlation coefficient
b. Cronbach's alpha
c. Dichotomous measurement
d. Histogram
A correlation coefficient
What does a p-value of 0.08 mean?
a. There are 8 chances in 100 that the finding is true
b. There are 8 chances in 100 that the finding is a chance variation
c. There are 8 chances in 10 that the finding is true
d. There are 8 chances in 100 that the finding is biased
B.
When one variable precedes the other in time and the correlation between them is high,
which statement can be made with confidence?
a. The variable that comes earliest in time causes the other variable
b. There is a high level of association between the two variables
c. The two variables have an association with an outcome variable
d. There are no extraneous variables at work in the situation
B
What does the statistic r2 represent?
a. What would happen if the variable were present at twice the levels found
b. The chances that the variables are perfectly correlated
, c. The proportion of variation in one variable that is accounted for by variation in the other
variable, and vice versa
d. What the correlation coefficient would be if the sample size were twice as large
C
What are the two dimensions that describe a relationship between two variables?
a. Truth and consequences
b. Direction and strength
c. Strength and weakness
d. Increasing and decreasing variation
B
In a correlation study, the p value of a Pearson r statistic is 0.005. What does this mean?
a. There is a small association between the two variables
b. There is a very small chance that the relationship between the two variables is zero
c. The variable that is first in time determined .5% of the variation in the other variable
d. Only 5% of the variables are the result of shared influences
B
What does a negative correlation statistic value mean?
a. For most individuals, both variables had values less than zero
b. The results are the opposite of what was expected
c. On the whole, individual with low values on one variable tended to have low values on
the other variable
d. On the whole, individuals with high values on one variable tended to have low values on
the other variable
D
